4,4'-dihydroxybiphenyl-3,3',5,5'-tetra(phenyl-4-carboxylic acid
3,3',5,5'-tetrakis(4-carboxyphenyl)-2,2',4,4',6,6'-hexamethyl-1,1'-biphenyl
5,5'-(2,5-pyridinediyl)bis-1,3-Benzenedicarboxylic acid
2',5'-dimethyl-[1,1':4',1''-terphenyl]-3,3'',5,5''-tetracarboxylic acid
2',5'-difluoro-[1,1':4',1''-terphenyl]-3,3'',5,5''-tetracarboxylic acid
2',3',5',6'-tetramethyl-[1,1':4',1''-terphenyl]-3,3'',5,5''-tetracarboxylic acid
2',5'-bis(trifluoromethyl)-[1,1':4',1''-terphenyl]-3,3'',5,5''-tetracarboxylic acid